By-passed-flue-gas cane-juice heater



1.0. FRAZIER. BY-PASSED FLUE GAS CANE JUICE HEATER.

- APPLICATION FILED MAR. 2t, 1918 1,31 1,336. Patented July 29, 1919.

3 SHEETSSHEET 1.

WITNESSES ATTORNEY THE .UMBIA PLANOGRAPII co" WASHINGTON. n. c.

J. 0. FRAZIER. BY-PASSED FLUE GAS CANE JUICE HEATER.

Patented J My 29, 1919.

APPLICATION FILED MMLZF. 1918.

3 SHEETS-SHEET 2.

lllllllllllllll! n n ATTO R N EY J. O. FRAZIER. BY-PASSED FLUE GAS CANE JUICE HEATER.

APPLICATION FILED MAR. 21

Patented July 29, i919.

3 SHEETS-SHEET 3.

ATTORN EY INVENT IIIIIIA'IIIII vna m E ME WITNESSES THE COLUMBIA PLANodRAPII co., WASHINGTON. D. C.

FFTGQ JULIUS OMAR FRAZIER, OF NEW ORLEANS, LOUISIANA.

BY-PASSED-FLUE-GAS CANE-JUICE HEATER.

To all whom it may concern:

Be it known that I, JULIUS O. FRAZIER, a citizen of the United States, residing at New Orleans, in the parish ofOrleans and State of Louisiana, have invented a new and useful By Passed Flue Gas Cane Juice Heater, of which the followingis, a speci fication.

This invention has reference to a heater for cane juice and its object is to utilize bypassed flue gases for heating the cane juice.

In accordance with the invention the main flue for the gases of combustionflowing to the stack is provided with a'by-pass and in the main flue there is located a damper by means of which the gases of combustion'may travel directly through the fiueto the stack;

or may be diverted through the by-pass, and such action may be brought about automatically.-

Located in the bypass is a series of'connected ducts or pipes to present a long tortuous passage for the cane juice so that the heated gases of combustion may act thereupon for a desirable length of time, and in order to increase the effect and supplement furnace draft the bypass is providedwith draft producing means such as a fan. The cane juice is forced through the tortuous passage by any suitable power means and provision is made whereby, should the flow of cane juice be stopped for any reason, the course of the flue gases is so controlled that such gases will pass directly through the flue to thestack instead of through the by-pa'ss, whereby overheating of the cane juice is avoided. Furthermore, provision is also made for ready access to the pipes through which the juice flows for cleansing and other purposes and provision is madefor ready access to the exterior of the pipes whereby deposits of soot and the like thereon may be removed without dismantling the structure. The invention will be best understood from a consideration of the following de tailed description taken in connection with the accompanying drawings forming part of this specification, with'the understanding,

Specification of Letters Patent.

Patented July 29, 1919.

Application filed March 21, 1918. Serial No. 223,878.

the showing of the drawings but may be changed and modified so long as such changes and modifications come within the scope of the appended claims.

"In the drawings Figure 1 isan elevation, with some parts broken away and in section, of a cane juice heater embodying the invention;

Fig. 2 is a section on the line 2-2 of Fig. 1 but drawn on a larger scale and showing portions of the headers on the top of the figure in plan view; j r V Fig. 3 is a section on the line 33 of Fig. 1 but drawn on the scale of Fig. 2;

Fig. 4 is a detailed sectional view of a damper controller used in connection with other features of the invention. 7

Referring to the drawings there is shown a flue l which may be-taken as indicative of a flue for the gases of combustion, leading from a furnace to a stack but neither the furnace nor the stack is shown in the drawings. At spaced points there are branch fiues 2 and 3 respectively, each connected with main flue 1 and in turn connected to gether, in a manner to be described, at the ends remote from their connections with the main flue.

Each branch flue 2 and 3 at the end remote from its connection with the main flue I has an extended mouth 4 and at opposite portions, say the top and bottom, are connecting plates 5 and 6 respectively, secured to the branch flues 2 and 3 by rivets 7 or in any other appropriate manner. V

Considering the plates 5 and 6 as the upper and lower parts of the connections between the mouths 1 of the branch flues 2 and 8, the two sides of the parts connecting said branch flues are made up of a series of frames 8 each having one edge 9 overlapped by the other edge 10 of a neighboring frame and these overlapping portions are secured together by rivets 11 or otherwise. The connected frames 8 are on opposite sides of a duct 12 extendingbetween the two branch flues 2and 3 so that the gases of combustion, when properly diverted, pass through the flue 2, to and through the duct or flue 12 and 13 alternating on opposite sides of the flue 12, with the terminal headers having sections 13, and together with the frames 8 forming the side walls of the flue 12. The headers are connected by tubes 14 which may be arranged in pairs or otherwise to increase the area of flow from header to header. Each group of tubes forms a separate path or pass for the liquid, for the purpose of increasing the heating surface per unit of pass length for a given volume of moving liquor. This also provides a better division of the hot gases among the smaller or thinner volumes of liquor and reduces the dis tance of the most remote liquor, that at the center of the tube, from the heating surface. In the particular arrangement shown in Fig. 1, there are six sections including twelve headers, the headers being connected together at opposite ends in series by pipes 15.

The entrance of the liquor is by way of an inlet pipe 16 at that end of the series where the cooler gases are discharging, the exit of liquor being at an outlet 17 where the hotest gases are entering the heater, thus preserving the best available balance of temperature difference.

At the right hand section of Fig. 1 the interior of the return chambers are exposed showing eight four-tube groups to each section. The liquor entering at 16, Fig. 1, makes eight transits across the flue 12 in that section and the same occurs in each succeeding section, emerging at 17 to the right. The division of a given volume into four streams as against one of equal area, doubles the heating surface in any unit, maintains the primary velocity with but slightly increased friction and reduces the distance by half of the liquor most remote from the tube walls. The inlet pipe 16 is connected to a pump 18 or other means for causing flow of the cane juice, or other liquid into and through the apparatus, and between the pump 18 and the pipe 16 is a damper controller 19 which in the particular arrangement shown is provided with an interior plate or pendulum disk 20 preferably of oblong or elliptical form. This disk is movable between the inlet and outlet sides of the damper controller and is of a size that it does not obstruct the flow of cane juice. The interior of the damper controller 19 is provided with stops 21 limiting the movement of the disk 20. The disk 20 is carried by a rock shaft 22 having rock arms 23 and 23 outside of the casing. The arm 23 is provided with an adjustable counterweight 24.

The other arm 23 has attached to it one end of a rod 25, the other end of the rod being attached to a rock arm 26 on one end of a rock shaft 27, extending through the flue 1 nd within the latter carrying a valve or damper 28 in the path of which are stops 29, whereby inone position of the disk 20 the damper 28 is fully open and in the other position of the disk 20 is closed against the steps 29.

Within the end 3 of the by-pass flue is a fan 30 mounted on the shaft 31 extending through a housing 32 opening through the walls of the end 3 of the by-pass to a point where it may receive power from any suit able source, preferably though not neces sarily a variable speed electric motor.

Each header 13 and 13 is provided with removable chamber covers 34, each cover or plate covering two adj aeent liquor passages, whereby access may be had to the heating tubes 14. These covers or cap plates are held to the respective headers each by a clamp or clamps 35 traversed by set screws 36, the clamps having hook ends 37 engaging behind extensions 38 of the respective header. The covers and clamps are all alike and therefore interchangeable.

The plates 8 between the headers are pierced by passages 39 normally closed by plugs 40 so that on the removal of the plugs the exteriors of the tubes 14 may be cleansed from deposits of soot and the like from the gases traversing the duct or chamber 12 in which these tubes are located.

iVith the heater described the cane juice is directed through the pipe 16 from the pump 18, passing by way of the casing 19. The course of the cane juice through the tubular heater made up of sections each com prising headers and connecting tubes, is a tortuous one with the flow of juice back and forth across the flow of hot gases of combustion diverted from the main flue through the bypass flue in which the tubular sections are installed. The rapidity of flow of the.

gases of combustion through the by-pass is increased by use of the fan 30 and the area of juice flow passages is so proportioned that the juice may have a velocity of say 550 ft. per minute, which velocity has been found most effective against deposits on the inner tube surfaces.

Provision is made for access to the tubes both inside and out with the tubes straight so that their inner surfaces may be readily reached and cleaned mechanically, should it become necessary, while a steam blast may be employed for cleaning the outer or fire sides of the tubes.

The by-pass arrangement is especially adapted for utilizing hitherto waste heat of furnace gases on their way to the stack.

In order to prevent undue concentration of the juice and the possible ruinous scorching of the same, should there be any cessation of the flow of the juice, the automatic control of the damper in the main flue is provided. WVhen there is no flow of liquid into the heater the swinging disk 20 is against the stop21 toward the pump 18, with the result that the damper 28 is open,

thisjb'eing brought aboutbythe weight 24:. When the juice or liquor enters the casing 19 the disk 20 is swung by the forceof the current against the stop 21' toward the group of tubes llwhereby the damper 28 is closed.-

struction witheach sectionseparate from the others, it is possible to increase the heating area byadding sections as may be found advisable. a r a The tubes and the headers they connect are grouped into units which in the particular showing of the drawing are narrow in the direction of the length of the by-pass and 00- cupy a space corresponding to the cross sectional area of the by-pass. This permits the assemblage of as many units as may be desired in the directionv of the length of the bypass, so that the by-pass may be made longer. or shorter by adding or subtracting units from the assemblage. {This makes the arrangement quits flexible with respect to. meeting various C O11Cl1r its capacity and for tions. 7 i

In the particular showing ofthe drawings the pipes 14.- are arranged horizontally, but

it will be understood that the pipes may be arranged vertically and the headers instead of being placed at the sides of the by-pass may be located at the top and bottom thereof. 7 .4

The invention is applicable for heating both cane juice and beet juice from which sugar is ultimately produced and the invention may be utilized for heating other liquids.

The by-pass very satisfactorily solves the problem of utilizin waste heat, because the heat utilizing insta lation in the by-pass in no wise interferes with the normal furnace operation. This is due to the fact that the flue gases may be directed wholly through the unobstructed main flue or wholly through the by-pass, in which by-pass the entire heat utilizing means are located.

What is claimed is 1. In a heater for the purpose described, the combination with a flue for conducting gases of combustion, of a by-pass connected to the flue, a series of pipes located in and extending back and forth through the bypass for conducting liquid, a damper within the flue'between the ends of the by-pass, and a valve connected to the pipes and responsive to liquid pressure, said valve having a normal tendency to close the damper in the flue.

2. In a heater for the purpose described and designed toutilize flue gases, a by-pass connected to the flue, a serles of separate units consisting of headers and connecting pipes with the units connected in series and all lodged in and forming part of the bypass structure, a valve connected to the entering end of the series of-units and responsive to the flow ofliquid to the pipes, and means under the control of the valve for causing the roducts of combustion to flow through the y-pass to heat the units or to be diverted therefrom.

3. In a heater for the purpose described, the combination with a flue for conducting gases of combustion, of a bypass for the gases of combustion connected to the flue, means for directing fluid through the bypass for subjection to the action of the products of combustion, a damper within the flue between the endsof the by-pass, and a valve responsive to the pressure of the fluid to be acted upon in the by-pass and having a normal tendency to close the damper in the flue.

4. A heater for liquids utilizing hot products of combustion as the heating agent, comprising a flue, a damper therein, and a by-pass around thedamper with the body of the bypass composed solely of a series of units connected face to face in order, each unit consisting of headers and pipes joining them for the serial travel of liquid through them and the headers constituting walls of the by-pass.

5. A heater for liquids utilizing hot products of combustion as the heating agent, comprising a by-pass through which the hot products of combustion may be diverted, said by-pass including a plurality of units each composed of headers and pipes spacing them and joining them in series, and each unit having means joining it to thenext unit in order, pipes joining the units together in series, and plates bridging the spaces between the header ends of the units, to thereby define the body portion of the by-pass.

6. A heater for liquids utilizing hot products of combustion as the heating agent, comprising a bypass through which the hot products of combustion may be diverted, said by-pass including a plurality of units each composed of headers with removable cap plates, straight pipes connecting the headers of each unit in series and spacing the headers of the unit apart, said headers having means joining them to the next unit in order, pipes joining the units together in series, and plates bridging the spaces between the header ends of the units, to thereby define the body portion of the by-pass.

7 A heater for liquids utilizing hot products of combustion as the heating agent, comprising a by-pass through which the hot products of combustion may be diverted,

said by-pass including a plurality of units each composed of headers with removable cap plates, straight pipes connecting the headers of each unit inseries and spacing the headers of the unit apart, said head ers having means joining them to the next unit in order, pipes joining the units together in series, and plates bridging the spaces between the header ends of the units, to thereby define the body portion of the by-pass, said end plates also being provided with normally closed passages for permitting access to the exteriors of the pipes.

8. In a heater for the purpose described, the combination with a flue for conducting gases of combustion, of a by-pass structure connected with the flue and consisting of a series of units eachcomposed of headers and pipes connecting the headers and arranged in serial order, the headers having matching means at adjacent sides connected together to constitute the corresponding side walls of the by-pass, and plates connected to the headers to form the remaining walls of the by-pass.

9. In a heater for the purpose described, a flue for gases of combustion, and a bypass for the flue comprising end members respectively connected to the flue at separated points, and a series of'units constituting the body of the flue and connected by the end members to the flue, each unit comprising headers and pipes connecting them in serial order and each, header being connected to the next header in order at the same side of the body of the by-pass to constitute walls for the body of the by-pass,

and plates connecting the ends oil? the headers to constitute the remainig .walls of the by-pass.

10. In a heater for the purpose described and designed to use flue gases, a by-pass con nected to the flue,ra liquid circulating system in the by-pass, a damper in the flue be tween the ends of the by-pass, and a valve included in the circulating system and responsive to move toward the open position under pressure of the liquid flowing through the circulating system, said valve having a normal tendency to close and thereby open the damper in the flue.

11. In a heater for the purpose described, a flue for gases of combustion, and a bypass for the flue comprising end members, and a seriesvof units constituting the body of the flue, each unit comprising headers and groups of pipes with the pipes of each group in multiple, and each header being connected to the next header in order at the same side of the body of the bypass to constitute walls for said body of the by-pass, V

and plates connecting the ends of the head ers to constitute the remaining walls of the by-pass.

12. In a heater for the purpose described and designed to use flue gases, a by-pass for the flue gases, and a liquidcirculating system in the by-pass including a series of headers and groups of pipes in multiple connecting the headers with the headers connected serially, and said headers constitut ingiportions of the walls of the by-pass. In testimony, that I claim the foregoing as my own, I have hereto aflixed my sig-,.

nature in the presenceof two witnesses.

JULIUS OMAR FRAZIER. Witnesses: r V V CEGILE PAYNE, GERTRTJDE COWALN.

Copies of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. V v 

